... requirement delivery is fast and cheap For the hexagon socket head cap screw we can make as your requriement! size , standard, ... made of carbon steel, alloy and stainless steel, aluminum, brass or other special materials. For finishing, we provide black oxide, zinc ... conformity with DIN, ANSI, AS, BS, JIS, GB, ISO or nonstandard specifications or against customers' requirements, in grades of 4.8, 6 ...